Have you seen the new combined yamaha and hpv class for wka man cup.Weight break does not work. long tracks hpv will kill yamaha.
I know this from road racing. In road racing the have a yamaha pipe class and a piston port class because the yamaha can,t run with piston ports on top end.I hope we do not adopt this new class for gska.

Road racing we could run with of beat the piston port non yamaha engines. The long tracks we go killed. Our track may be differant, but you only need 1 guy to dominate with a kpv-komet to ruin the class.The italian motors are far superior to the yamaha. Cost of new komet is very high. the bottom line is it,s the clubs call. Could see what hapens at Daytona man cup. we will be running the road race.

Pete-IMHO, we have had such good response to the Yamaha Sr class the way it is, I doubt we will make any changes for the 2014 season.

Yamaha seems like a great step up in performance from te clones without the expense of the Rotax powered karts..c_________________"kart racing since 1958, was and still the best bank for the buck in motorsports"

Chris ran Komet Jr. at Man Cup, so we have a fresh Comet built KPV. We'll probably take take both to the track and get some real data, since Chris will be running this combined class at Daytona.

We ran the KPV at our track in testing, and I suspect it's going to take a bunch of weight to equalize them.
Having said that, Pete's right about the cost. KPV is another thousand dollars over a Yamaha, but it's a MUCH nicer engine.

One other consideration: Out in California, Stu Hayner runs a series called Formula 100 where they already run this combined class, and it's been very popular, with both engines winning, so it's not a real crazy idea for WKA to do it. It could work.

But already-blueprinted-but-used Yamahas can be bought for $800-1000-ish.

And a used KPV and be bought for $1000-1200....

The real question thats going to have to be dealt with is whether we want to continue to follow WKA rules or not. Personally, I don't care either way. Like Pete said, its probably best to wait for Daytona before we have some knee-jerk reaction to the new class.

There's always time to not change things.

Someone correct me if I'm wrong, but I think we've tried to follow WKA rules to make it possible for people to come from out of the area and race. Maybe (just Yamaha), we need to consider USPKS rules instead?

Someone correct me if I'm wrong, but I think we've tried to follow WKA rules to make it possible for people to come from out of the area and race. Maybe (just Yamaha), we need to consider USPKS rules instead?

CN

Doesn't the USPKS specify the can exhaust? and a weight of 350?_________________Tonykart EVRR / Adkins Yamaha